1. Metal Matrix Composites
Typically use commercial alloy metal for matrix material, eg, Aluminum, Titanium.
Reinforced with ceramic fibres, continuous or discontinuous, particles, or whiskers.
Give improved specific strength and stiffness, damping.
Costs are relatively high.
99% Al2O3
Su=3000 MPa
E = 400 Gpa
r= 3.95 g/cm3

2. Boron Carbide Reinforced Aluminum
B4C in Al matrix
Density less than Al alloy
Can be welded using standard TIG equipment
Available in the same forms as conventional aluminum. Can be pressure cast, extruded, and forged. Available in sheet down to foil dimensions
Trade name Boralyn; H=low strength, high ductility, E = higher strength alloy. Depends on matrix alloy.

3. Property Comparisons for MMC

5. Continuous Fiber-Aluminum Matrix Composites (CF-AMC)
Al-2wt%Cu with 60vol% Al2O3 fibre
Offers high longitudinal strength (1500 MPa) and good transverse strength (270 MPa)
Product forms: near net-shape products
High stiffness
Lightweight
Pure Al with 60vol% Al2O3 fibre
Very high longitudinal strength (1650 MPa) and moderate transverse strength (140 MPa)
Good corrosion resistance
Good electrical conductivity
Product forms: near net-shape components and continuous wire

6. Properties of AMC

7. AMC - Specific Properties

8. Stress-Strain Response
Longitudinal
Transverse

9. Fatigue Strength of AMC

10. Titanium Matrix Composite
Electron beam physical vapor deposition coating high-strength, high-modulus silicon carbide fibers with Ti-6Al-4V matrix.
Mono-Filament

11. Product Applications